9. Patients in this study should avoid having child. Women of childbearing potential must have a negative serum pregnancy test done 1 week prior to the administration of the study drug. She and her partner should prevent pregnancy (oral contraceptives, intrauterine contraceptive device, barrier method of contraception in conjunction with spermicidal jelly or surgically sterile) up to at least 6 months after last treatment completion or the last drug dose, whatever happens first.